package chapter10.login;

import java.sql.*;
import java.util.Scanner;

public class Login {
    public static void main(String[] args) throws SQLException{
        Statement stmt = null;
        ResultSet rs = null;
        Connection conn = null;
        try{
            // 1. 注册数据库的驱动
            Class.forName("com.mysql.cj.jdbc.Driver");
            // 2. 通过DriverManager获取数据库连接
            String url = "jdbc:mysql://localhost:3306/jdbc?serverTimezone=GMT%2B8&useSSL=false";
            String username = "root";// 数据库账户
            String password = "123456";
            conn = DriverManager.getConnection(url,username,password);
            Scanner sc = new Scanner(System.in);
            System.out.println("用户登录");
            System.out.println("请输入你的姓名 ");
            String user = sc.nextLine();
            System.out.println("请输入你的密码");
            String userPwd = sc.next();
            String loginsql = "select * from users where name = ? and password = ?";
            PreparedStatement pm = conn.prepareStatement(loginsql);
            pm.setString(1,user);
            pm.setString(2,userPwd);
            rs = pm.executeQuery();
            System.out.println("id  |   name    |   password   |    email   |   birthday");
            while (rs.next()){
                int id = rs.getInt("id");
                String name = rs.getString("name");
                String psw = rs.getString("password");
                String email = rs.getString("email");
                Date birthday = rs.getDate("birthday");
                System.out.println(id +"    |   "+name+"    |   "+psw+" |   "+email+"    |   "+birthday);
                    }
        }catch(ClassNotFoundException e){
            e.printStackTrace();
        }finally{
            // 6. 回收数据库资源
            if (rs != null){
                try{
                    rs.close();
                }catch (SQLException e){
                    e.printStackTrace();
                }
                rs = null;
            }
            if (stmt != null){
                try{
                    stmt.close();
                }catch (SQLException e){
                    e.printStackTrace();
                }
                stmt = null;
            }
            if (conn != null){
                try{
                    conn.close();
                }catch (SQLException e){
                    e.printStackTrace();
                }
                conn = null;
            }
        }
    }
}
